This circuit is an improvement over the LM741/LM1458
receiver. The JFET features low noise in the audio spectrum and high impedance
resulting in a very sensitive front end receiver, more so than the photo transistor used in the other two receiver
circuits. This design is actually a variation of K3PGP's PIN Diode receiver and
WB9AJZ Cheepo "CW" Receiver.

TL082 JFET /
PIN Diode Receiver Circuit Board

Notice the small wafer shape of the PIN diode on the left
side of the board. The top side of the board has the copper left on to shielding
against stray capacitance. The greater sensitivity of the JFET causes problems
with printed circuit board designs. Stray capacitance can cause feed
back/oscillation or a decrease in signal amplification.